Malicious PDF — malware analysis report

Static analysis result for SHA-256 d153d2bac3add747…

MALICIOUS

PDF

45.0 KB Created: 2021-06-04 01:03:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d5b109c87ed62dc855393d8bc474f84e SHA-1: 751cff9037efdab5d394217546f78b72da0bba3a SHA-256: d153d2bac3add747d1cfedf4b70c5875fc7b20ad37f6020968e703df22e15432
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector, disguised as offers for free game currency or hacks. The document body and embedded links suggest a lure for scams related to popular games like Roblox and Minecraft. The presence of multiple links to external PDFs and a redirector indicates an attempt to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/431946152/free-robux-reddit-game-hack In PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5193 26852 bytes
SHA-256: b2485ce4b428111a835846c12d9362861a16a0fa33ea0a2b3474495bdf5169a2
font_01_sfnt_off00008ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE9 18412 bytes
SHA-256: c557a72efce44f866a9d9d033701dfd5e052f904d36d096978818f2976e16735

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